Measuring pump



Sept. 15, 1931. LANSER 1,823,658-

MEASURING PUMP Filed Jan. 15, 1951 2 Sheets-Sheet J.

%, fME M Sept. 15, 1931. V A. LANSER 1,823,658

MEASURING PUMP Filed Jan. 15, 1931 2 Sheets-Sheet 2 my: Lamarv Patented Sept. 15, 193i UNITED STATES ALFRED LANSER, F GORSEAUX-VEVEY, SWITZERLAND MEASURING PUMP Application filed January 15, 1931, Serial No. 508,934, and in France January 23, 1930.

The present invention relates to liquid measuring apparatus.

One of the objects of the invention is to provide an apparatus in which a pair of measuring vessels is alternately filled and discharged under the action of pressure built up by the liquid to be measured, the amount of liquid used for driving the apparatus being independent of the quantities measured out. Other objects will appear in the course of the detailed description now to be given with reference to the accompanying drawings, in which Fig. 1 is a diagrammatic section through one illustrative embodiment of the invention; Fig. 2 is a modified form of the structure shown in Fig. 1.

Referring to Fig. 1 of the drawings there is shown a pair of measuring vessels a, b, a

pump 1, a conduit 2 connected to the dis charge side of pump 1, a bifurcated conduit 3 having a pair of bores 4 at the free extremities thereof, discharge opening 5, 5 positioned in alignment with bores 4, 4, a pair 2 of piston valves 6 slidably mounted to move back and forth between bores 4, 4 and openings 5, 5,- a pair of valve rods 7 7 carrying discs 7 at the lower extremities thereof, a v rocking lever 8 provided with forked ends 8',

8 and an arm 8 ,a spring 9 tending to' maintain valves 6 and forked ends 8 of lever 8 in spaced relation,a pivotally mounted hook-shaped element 10 provided with an appendage 10' of the form shown in the drawings and connecting forks 8 to discs 7 a stop 11 mounted in the path of movement of rod 7, and a compression spring 12 hearing at opposite extrem1t1es against a fixed PIVOt and the free end of arm 8 The hereinabove described assembly func tions in the following way When measuring vessel 6 becomes filled, the combined float and needle valve mounted at the upper part thereof will close the orifice above both valves 6. The valve of vessel 6,

being at the lower end of its stroke, cannot yield to this pressure. On the contrary, the

valve of vessel a will descend, thus turning rocking lever 8. Spring 12 will thus be compressed until the point thereof attached to an arm 8 proceeds beyond the straight line connecting its outer" attaching point to the pivoting point of the rocking lever. During this first step of the pivoting movement of lever 8, spring 9 of valve 6 in measuring vessel 6 will be compressed, and when its compression has reached a suflicient value (this is arranged to occur as soon as lever 8 has cleared the dead centre) to overcome the excess of pressure in vessel 6, lever 8 comes to rest, and the valve of vessel 6 closes bore 4 supplying liquid thereto while at the same time valve 6 of 5 vessel a closes discharge orifice 5 of the latter. If the various operation parts are properly designed, the foregoing operations will be more readily effected since valve 6 in vessel a at starting and when opening orifice 4 reduces the excess pressure above valve 6 in vessel 6.

hen rocking lever 8, and with it valve 6 of measuring vessel a, reaches the lower end of its stroke, the outer end 10 of hook-shaped element 10 makes contact with stop 11, whereby element 1.0 is turned about and rocking, lever 8 is released from the valve rod.

This valve, gear of simple construction opcrates automaticallyas long as pumping continues. V i

One advantage of this mechanism over known devices consists in the fact that the amount of liquid employed for driving purposes is quite independent of the measuring operation. The driving liquid proceeds into the vessel which is to be filled (if desired it might be returned to the tank by suitable means), and the apparatus can operate to deliver an exactly constant'volume of liquid. This result is obtained by'designing the apparatus so that the motion of the active valve takes place in two steps. During the first step, the valve covers more than one half its total stroke, thus assuring delivery of the exact contents of the measuring vessel.

In the modification shown in Fig. 2, rock ing lever 8 is divided into two arms 202O mounted to pivot about axis 13 and articulating with rods 7, 7. Sectors 14, notched. at 14, are mounted on each arm and are shaped to make contact with one another above or below pivoting point 13. A boss is mounted on each sector, to which is attached the end of a spring subjected to traction and tending to maintain the parts in such position that arms 2O will be substantially in alignment. An arm 16 is pivotally mounted on axle 13, and at its outer end is pivoted a starshaped member 17 having three branches spaced 120 degrees apart. Two of the branches 1'?" have a length such that each branch will bring a small roller 17 into the corresponding notch 14 of a sector 1a. The third branch is subjected to the repelling action of a spring 18 which it compresses against a fixed point 19 situated on a straight line passing through pivoting axis 13. Said spring 18 is preferably mounted upon a rod or link slidable in an axle which is mounted loose at point 19. v

This form of apparatus functions as follows: The parts being in the position shown in Fi 2 in which vessel 7) is full of liquid, if pumping is continued, valve 6 of vessel a, which is not held at the bottom, will yield to the excess of pressure, thus lowering the corresponding arm of the rocking device and stretching spring 15, while at the same time actuating-by means of sector 14lthe starshaped member 17 whereof one roller is engaged-in notch 14 of sector 14. Valve 6 of vessel 1) cannot move, since it is held in position by the high pressure in this vessel, and this action will take place until valve 6 of vessel a is about to open orifice 4. Shortly before this occurs, the pivoting point of starshaped member 17, and hence theend of its branch 17 which drives back spring 18, will have passed beyond the straight line joining point 19 and the centre of pivot 13, and sectors 14 will now have made mutual contact below this latter point. One sector will thus be actuated by the other, hence moving the two arms 20. Valve 6 of vessel 6 will now rise from its lower to itsupper position, this movement being readily and abruptly executed, since it takes place under the effect of kinetic energy stored up by valve 6 of vessel a, and also due to the contraction of spring 15, and to the expansion of spring 18. Furthermore, during the first part of the movement of valve 6 of vessel a, the pressure at the delivery end of pump 52 (pipe 2, con duit 3, vessel 1)) will have been reduced, and valve 6 will move upward in response to this reduction in pressure. As pumping continues, the cycle of movements recommences, and may be continued as long as desired.

I claim:

1. In combination, a pair of measuring vessels having upper and lower openings formed therein, float valves controlling the upper openings in'said measuring vessels, a pump, a conduit system connected to the delivery side of said pump, said conduit system terminating in a pair of bores positioned inside said measuring vessels in alignment with the lower openings in the latter, piston valves mounted to slide in said bores and in said lower openings, and a valve control assembly operative to actuate one of said piston valves only after the other of said piston valves has been displaced through a predetermined portion of its total course.

2. In combination, a pair of measuring vessels having upper and lower openings formed therein, float valves controlling the upper openings in said measuring vessels,- a pump, a conduit system connected to the delivery side of said pump, said conduit system terminating in a pair of bores positioned inside said measuring vessels in alignment with the lower openings in the latter, piston valves mounted to slide in said bores and in said lower openings, and a valve control assembly comprising a pivoted lever, a pair of valve rods connected to said piston valves and loosely engaging with the tree extremities of said pivoted lever, means tending to force said piston valves and the free extremities of said pivoted lever apart, means operative to lock the free extremities of either one of said pivoted levers to one of said valve rods, and resilient means operative to move said pivoted lever through its dead point.

3. In combination, a pair of measuring vessels having upper and lower openings formed therein, float valves controlling the upper openings in said measuring vessels, a pump, a conduit system connected to the delivery side of said pump, said conduit system terminating in a pair ofbores positioned inside said measuring vessels in alignment with the lower openings in the latter, piston valves mounted to slide in said bores and in said lower openings, and a valve control assembly comprising a pivoted lever, a pair of valve rods connected to said-piston valves and loosely engaging with the free extremities of said pivoted lever, springs tending to force said piston valves and the free extremities of said pivoted lever apart, pivoted means operative to lock either one of the free extremities of said pivoted lever to one of said valve rods, and means operative to move said pivoted lever through its dead point.

4. A structure as defined in claim 3 in combination with a stop operative to actuate said pivoted means. Y

5. In combination, a pair of measuring vessels having upper and lower openings formed therein, float valves controlling the upper openings in said measuring vessels, a pump, a conduit system connected to the delivery side of said pump, said conduit system terminating in a pair of bores positioned inside said measuring vessels in alignment with the lower openings in the latter, piston valves mounted to slide in said bores and in said lower openings, and a valve control assembly comprising a pair of independent pivoted arms, a pair of valve rods extending from said arms to said piston valves, and means operative by the movement of one of said arms through a predetermined angle to actuate the other of said arms.

6. In combination, a pair of measuring vessels having upper and lower openings formed therein,- float valves controlling the upper openings in said measuring vessels, a pump, a conduit system connected to the delivery side of said pump, said conduit system terminating in a pair of bores positioned inside said measuring vessels in alignment with the lower openings in the latter, piston valves mounted to slide in said bores and in said lower openings, and a valve control assembly comprising a pair of rotatable sectors, arms mounted on said sectors, valve rods extending from said arms to said piston rods, a spring connecting said sectors, and means operative to actuate one m, of said sectors when the other of said sectors has rotated through a predetermined angle.

In testimony whereof I aflix my signature.

ALFRED LANSER. 

